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laptop(s) keyboards, some keys are not functioning

many of the laptop I've encountered has keys problem
but I'm not sure if the problem is in the BIOS or in the keyboard itself
example:
left arrow, right control, right alt, func key doesn't

which do you think the problem from?
thank you

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SuperTaco

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SOLUTION

JohnnyCanuck

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systan

ASKER

Ok, to be sure, what if these keys aren't working?
- , y , t , tab , g , v , left arrow , right arrow

systan

ASKER

Ok, to be sure, what if these keys aren't working?
- , y , t , tab , g , v , left arrow , right arrow

it seems like a spill.

what do you meant by spill?
thanks

ASKER CERTIFIED SOLUTION

sjklein42

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systan

ASKER

First, you can confirm it is the laptop keyboard by plugging in a USB keyboard and seeing if that works ok.

So if the external USB keyboard is find to used, then it is confirm that the problem is the keyboard set only??

I think this can be fixed by washing the keyboard set by an alcohol, droned it for a minutes. I hope the circuits are OK when liquid dries. I hope that works.

thanks

systan

ASKER

So if the external USB keyboard is find to used, then it is confirm that the problem is the keyboard set only??

my bad
So if the external USB keyboard is fine to used, then it is confirm that the problem is the keyboard set only??

systan

ASKER

my bad again
So if the external USB keyboard is fine to used, then it is confirmed that the problem is the keyboard set only??

sjklein42

Ha. Maybe it is your fingers, not the keyboard! (Just joking.)

Yes, that is what I meant. If the USB keyboard works, then it is almost surely the laptop keyboard that is broken. You may be able to clean it - nothing to lose - but I have never been able to bring them back. Try reseating the ribbon cable first.

systan

ASKER

but I have never been able to bring them back

experienced

even what I have mentioned?

I think this can be fixed by washing the keyboard set by an alcohol, droned it for a minutes. I hope the circuits are OK when liquid dries. I hope that works.

Ok, that's a fine answer maybe, gotho close this post for a while this day,
thanks

SOLUTION

☠ MASQ ☠

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nobus

you can always test if the keyboard keys work or not when booted from a live cd :
http://www.ubcd4win.com/ ubcd Win
ftp://ftp.gwdg.de/pub/linux/knoppix/KNOPPIX_V6.7.0CD-2011-08-01-EN.iso Knoppix

that will show if the hardware is bad or not

>> So if the external USB keyboard is fine to used, then it is confirm that the problem is the keyboard set only?? << NOT TRUE - it can still be the motherboard keyboard controller or connector circuitry

and washing does not help in most cases; the keyboards are made with layered sheets - but as said, nothing to loose by trying

systan

ASKER

NOT TRUE - it can still be the motherboard keyboard controller or connector circuitry

I think this cause by a bios update/downdate/update

Ok, I think the answers are complete, let me have time to close this post, for a while this day.

thanks to all

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nobus

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systan

ASKER

thank you all